难不难6 R2 W, e% H7 _0 h" D$ W
. l: C. p- F, v8 z
I don't think anybody can answer this question accurately...* k7 \5 M0 }& |! x8 a0 S5 P
" |' m: `7 U4 x7 z" `
for some people, 难2 @, j ^/ ?, ^! Q9 X
for some people, 不难 $ ], L; Y+ p8 K, D' }7 O. g+ Z - z' B4 U: F/ K6 T' M! u5 HEvaluate yourself first